The Formation of Homospermidine by an Enzyme from Rhodopseudomonas viridis

1979 ◽  
Vol 7 (1) ◽  
pp. 199-201 ◽  
Author(s):  
GEORGE H. TAIT
Keyword(s):  
Rhodopseudomonas Viridis

Structural analysis of the photosynthetic membrane from Ectothiorhodospira halochloris

1983 ◽  
Vol 41 ◽  
pp. 740-741
Author(s):  
H. Engelhardt ◽  
R. Guckenberger ◽  
W. Baumeister
Keyword(s):  
Lattice Structure ◽  
Bacterial Species ◽  
Hexagonal Lattice ◽  
Reaction Centre ◽  
Photosynthetic Membrane ◽  
Rhodopseudomonas Viridis ◽  
Photosynthetic Membranes ◽  
Ectothiorhodospira Halochloris ◽  
Main Components

Bacterial photosynthetic membranes contain, apart from lipids and electron transport components, reaction centre (RC) and light harvesting (LH) polypeptides as the main components. The RC-LH complexes in Rhodopseudomonas viridis membranes are known since quite seme time to form a hexagonal lattice structure in vivo; hence this membrane attracted the particular attention of electron microscopists. Contrary to previous claims in the literature we found, however, that 2-D periodically organized photosynthetic membranes are not a unique feature of Rhodopseudomonas viridis. At least five bacterial species, all bacteriophyll b - containing, possess membranes with the RC-LH complexes regularly arrayed. All these membranes appear to have a similar lattice structure and fine-morphology. The lattice spacings of the Ectothiorhodospira haloohloris, Ectothiorhodospira abdelmalekii and Rhodopseudomonas viridis membranes are close to 13 nm, those of Thiocapsa pfennigii and Rhodopseudomonas sulfoviridis are slightly smaller (∼12.5 nm).

scholarly journals Peptidoglycan of Rhodopseudomonas viridis: partial lack of N-acetyl substitution of glucosamine.

1982 ◽  
Vol 149 (1) ◽  
pp. 151-155 ◽  
Author(s):  
E Schmelzer ◽  
J Weckesser ◽  
R Warth ◽  
H Mayer
Keyword(s):  
Rhodopseudomonas Viridis
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